[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / mgag200 / mgag200_main.c

/*
 * Copyright 2010 Matt Turner.
 * Copyright 2012 Red Hat
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License version 2. See the file COPYING in the main
 * directory of this archive for more details.
 *
 * Authors: Matthew Garrett
 *          Matt Turner
 *          Dave Airlie
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "mgag200_drv.h"

static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
	if (mga_fb->obj)
		drm_gem_object_unreference_unlocked(mga_fb->obj);
	drm_framebuffer_cleanup(fb);
	kfree(fb);
}

static int mga_user_framebuffer_create_handle(struct drm_framebuffer *fb,
						 struct drm_file *file_priv,
						 unsigned int *handle)
{
	return 0;
}

static const struct drm_framebuffer_funcs mga_fb_funcs = {
	.destroy = mga_user_framebuffer_destroy,
	.create_handle = mga_user_framebuffer_create_handle,
};

int mgag200_framebuffer_init(struct drm_device *dev,
			     struct mga_framebuffer *gfb,
			     struct drm_mode_fb_cmd2 *mode_cmd,
			     struct drm_gem_object *obj)
{
	int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
	if (ret) {
		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
		return ret;
	}
	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	gfb->obj = obj;
	return 0;
}

static struct drm_framebuffer *
mgag200_user_framebuffer_create(struct drm_device *dev,
				struct drm_file *filp,
				struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj;
	struct mga_framebuffer *mga_fb;
	int ret;

	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	if (obj == NULL)
		return ERR_PTR(-ENOENT);

	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
	if (!mga_fb) {
		drm_gem_object_unreference_unlocked(obj);
		return ERR_PTR(-ENOMEM);
	}

	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
	if (ret) {
		drm_gem_object_unreference_unlocked(obj);
		kfree(mga_fb);
		return ERR_PTR(ret);
	}
	return &mga_fb->base;
}

static const struct drm_mode_config_funcs mga_mode_funcs = {
	.fb_create = mgag200_user_framebuffer_create,
};

/* Unmap the framebuffer from the core and release the memory */
static void mga_vram_fini(struct mga_device *mdev)
{
	pci_iounmap(mdev->dev->pdev, mdev->rmmio);
	mdev->rmmio = NULL;
	if (mdev->mc.vram_base)
		release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window);
}

static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
{
	int offset;
	int orig;
	int test1, test2;
	int orig1, orig2;

	/* Probe */
	orig = ioread16(mem);
	iowrite16(0, mem);

	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
		orig1 = ioread8(mem + offset);
		orig2 = ioread8(mem + offset + 0x100);

		iowrite16(0xaa55, mem + offset);
		iowrite16(0xaa55, mem + offset + 0x100);

		test1 = ioread16(mem + offset);
		test2 = ioread16(mem);

		iowrite16(orig1, mem + offset);
		iowrite16(orig2, mem + offset + 0x100);

		if (test1 != 0xaa55) {
			break;
		}

		if (test2) {
			break;
		}
	}

	iowrite16(orig, mem);
	return offset - 65536;
}

/* Map the framebuffer from the card and configure the core */
static int mga_vram_init(struct mga_device *mdev)
{
	void __iomem *mem;
	struct apertures_struct *aper = alloc_apertures(1);

	/* BAR 0 is VRAM */
	mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
	mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);

	aper->ranges[0].base = mdev->mc.vram_base;
	aper->ranges[0].size = mdev->mc.vram_window;
	aper->count = 1;

	remove_conflicting_framebuffers(aper, "mgafb", true);

	if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window,
				"mgadrmfb_vram")) {
		DRM_ERROR("can't reserve VRAM\n");
		return -ENXIO;
	}

	mem = pci_iomap(mdev->dev->pdev, 0, 0);

	mdev->mc.vram_size = mga_probe_vram(mdev, mem);

	pci_iounmap(mdev->dev->pdev, mem);

	return 0;
}

static int mgag200_device_init(struct drm_device *dev,
			       uint32_t flags)
{
	struct mga_device *mdev = dev->dev_private;
	int ret, option;

	mdev->type = flags;

	/* Hardcode the number of CRTCs to 1 */
	mdev->num_crtc = 1;

	pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
	mdev->has_sdram = !(option & (1 << 14));

	/* BAR 0 is the framebuffer, BAR 1 contains registers */
	mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
	mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);

	if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size,
				"mgadrmfb_mmio")) {
		DRM_ERROR("can't reserve mmio registers\n");
		return -ENOMEM;
	}

	mdev->rmmio = pci_iomap(dev->pdev, 1, 0);
	if (mdev->rmmio == NULL)
		return -ENOMEM;

	/* stash G200 SE model number for later use */
	if (IS_G200_SE(mdev))
		mdev->reg_1e24 = RREG32(0x1e24);

	ret = mga_vram_init(mdev);
	if (ret) {
		release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
		return ret;
	}

	mdev->bpp_shifts[0] = 0;
	mdev->bpp_shifts[1] = 1;
	mdev->bpp_shifts[2] = 0;
	mdev->bpp_shifts[3] = 2;
	return 0;
}

void mgag200_device_fini(struct mga_device *mdev)
{
	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
	mga_vram_fini(mdev);
}

/*
 * Functions here will be called by the core once it's bound the driver to
 * a PCI device
 */


int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
{
	struct mga_device *mdev;
	int r;

	mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL);
	if (mdev == NULL)
		return -ENOMEM;
	dev->dev_private = (void *)mdev;
	mdev->dev = dev;

	r = mgag200_device_init(dev, flags);
	if (r) {
		dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
		goto out;
	}
	r = mgag200_mm_init(mdev);
	if (r)
		goto out;

	drm_mode_config_init(dev);
	dev->mode_config.funcs = (void *)&mga_mode_funcs;
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.preferred_depth = 24;
	dev->mode_config.prefer_shadow = 1;

	r = mgag200_modeset_init(mdev);
	if (r)
		dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
out:
	if (r)
		mgag200_driver_unload(dev);
	return r;
}

int mgag200_driver_unload(struct drm_device *dev)
{
	struct mga_device *mdev = dev->dev_private;

	if (mdev == NULL)
		return 0;
	mgag200_modeset_fini(mdev);
	mgag200_fbdev_fini(mdev);
	drm_mode_config_cleanup(dev);
	mgag200_mm_fini(mdev);
	mgag200_device_fini(mdev);
	kfree(mdev);
	dev->dev_private = NULL;
	return 0;
}

int mgag200_gem_create(struct drm_device *dev,
		   u32 size, bool iskernel,
		   struct drm_gem_object **obj)
{
	struct mgag200_bo *astbo;
	int ret;

	*obj = NULL;

	size = roundup(size, PAGE_SIZE);
	if (size == 0)
		return -EINVAL;

	ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
	if (ret) {
		if (ret != -ERESTARTSYS)
			DRM_ERROR("failed to allocate GEM object\n");
		return ret;
	}
	*obj = &astbo->gem;
	return 0;
}

int mgag200_dumb_create(struct drm_file *file,
		    struct drm_device *dev,
		    struct drm_mode_create_dumb *args)
{
	int ret;
	struct drm_gem_object *gobj;
	u32 handle;

	args->pitch = args->width * ((args->bpp + 7) / 8);
	args->size = args->pitch * args->height;

	ret = mgag200_gem_create(dev, args->size, false,
			     &gobj);
	if (ret)
		return ret;

	ret = drm_gem_handle_create(file, gobj, &handle);
	drm_gem_object_unreference_unlocked(gobj);
	if (ret)
		return ret;

	args->handle = handle;
	return 0;
}

int mgag200_dumb_destroy(struct drm_file *file,
		     struct drm_device *dev,
		     uint32_t handle)
{
	return drm_gem_handle_delete(file, handle);
}

int mgag200_gem_init_object(struct drm_gem_object *obj)
{
	BUG();
	return 0;
}

void mgag200_bo_unref(struct mgag200_bo **bo)
{
	struct ttm_buffer_object *tbo;

	if ((*bo) == NULL)
		return;

	tbo = &((*bo)->bo);
	ttm_bo_unref(&tbo);
	if (tbo == NULL)
		*bo = NULL;

}

void mgag200_gem_free_object(struct drm_gem_object *obj)
{
	struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);

	if (!mgag200_bo)
		return;
	mgag200_bo_unref(&mgag200_bo);
}


static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
{
	return bo->bo.addr_space_offset;
}

int
mgag200_dumb_mmap_offset(struct drm_file *file,
		     struct drm_device *dev,
		     uint32_t handle,
		     uint64_t *offset)
{
	struct drm_gem_object *obj;
	int ret;
	struct mgag200_bo *bo;

	mutex_lock(&dev->struct_mutex);
	obj = drm_gem_object_lookup(dev, file, handle);
	if (obj == NULL) {
		ret = -ENOENT;
		goto out_unlock;
	}

	bo = gem_to_mga_bo(obj);
	*offset = mgag200_bo_mmap_offset(bo);

	drm_gem_object_unreference(obj);
	ret = 0;
out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return ret;

}
Commit	Line	Data
414c4531 DA	1	/*
	2	* Copyright 2010 Matt Turner.
	3	* Copyright 2012 Red Hat
	4	*
	5	* This file is subject to the terms and conditions of the GNU General
	6	* Public License version 2. See the file COPYING in the main
	7	* directory of this archive for more details.
	8	*
	9	* Authors: Matthew Garrett
	10	* Matt Turner
	11	* Dave Airlie
	12	*/
760285e7 DH	13	#include <drm/drmP.h>
760285e7 DH	14	#include <drm/drm_crtc_helper.h>
414c4531 DA	15	#include "mgag200_drv.h"
	16
	17	static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
	18	{
	19	struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
	20	if (mga_fb->obj)
	21	drm_gem_object_unreference_unlocked(mga_fb->obj);
	22	drm_framebuffer_cleanup(fb);
	23	kfree(fb);
	24	}
	25
	26	static int mga_user_framebuffer_create_handle(struct drm_framebuffer *fb,
	27	struct drm_file *file_priv,
	28	unsigned int *handle)
	29	{
	30	return 0;
	31	}
	32
	33	static const struct drm_framebuffer_funcs mga_fb_funcs = {
	34	.destroy = mga_user_framebuffer_destroy,
	35	.create_handle = mga_user_framebuffer_create_handle,
	36	};
	37
	38	int mgag200_framebuffer_init(struct drm_device *dev,
	39	struct mga_framebuffer *gfb,
	40	struct drm_mode_fb_cmd2 *mode_cmd,
	41	struct drm_gem_object *obj)
	42	{
	43	int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
	44	if (ret) {
	45	DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
	46	return ret;
	47	}
	48	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	49	gfb->obj = obj;
	50	return 0;
	51	}
	52
	53	static struct drm_framebuffer *
	54	mgag200_user_framebuffer_create(struct drm_device *dev,
	55	struct drm_file *filp,
	56	struct drm_mode_fb_cmd2 *mode_cmd)
	57	{
	58	struct drm_gem_object *obj;
	59	struct mga_framebuffer *mga_fb;
	60	int ret;
	61
	62	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	63	if (obj == NULL)
	64	return ERR_PTR(-ENOENT);
	65
	66	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
	67	if (!mga_fb) {
	68	drm_gem_object_unreference_unlocked(obj);
	69	return ERR_PTR(-ENOMEM);
	70	}
	71
	72	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
	73	if (ret) {
	74	drm_gem_object_unreference_unlocked(obj);
	75	kfree(mga_fb);
	76	return ERR_PTR(ret);
	77	}
	78	return &mga_fb->base;
79	}
80
81	static const struct drm_mode_config_funcs mga_mode_funcs = {
82	.fb_create = mgag200_user_framebuffer_create,
83	};
84
85	/* Unmap the framebuffer from the core and release the memory */
86	static void mga_vram_fini(struct mga_device *mdev)
87	{
88	pci_iounmap(mdev->dev->pdev, mdev->rmmio);
89	mdev->rmmio = NULL;
90	if (mdev->mc.vram_base)
91	release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window);
92	}
93
94	static int mga_probe_vram(struct mga_device mdev, void __iomem mem)
95	{
96	int offset;
97	int orig;
98	int test1, test2;
99	int orig1, orig2;
100
101	/* Probe */
102	orig = ioread16(mem);
103	iowrite16(0, mem);
104
105	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
106	orig1 = ioread8(mem + offset);
107	orig2 = ioread8(mem + offset + 0x100);
108
109	iowrite16(0xaa55, mem + offset);
110	iowrite16(0xaa55, mem + offset + 0x100);
111
112	test1 = ioread16(mem + offset);
113	test2 = ioread16(mem);
114
115	iowrite16(orig1, mem + offset);
116	iowrite16(orig2, mem + offset + 0x100);
117
118	if (test1 != 0xaa55) {
119	break;
120	}
121
122	if (test2) {
123	break;
124	}
125	}
126
127	iowrite16(orig, mem);
128	return offset - 65536;
129	}
130
131	/* Map the framebuffer from the card and configure the core */
132	static int mga_vram_init(struct mga_device *mdev)
133	{
134	void __iomem *mem;
135	struct apertures_struct *aper = alloc_apertures(1);
136
137	/* BAR 0 is VRAM */
138	mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
139	mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
140
141	aper->ranges[0].base = mdev->mc.vram_base;
142	aper->ranges[0].size = mdev->mc.vram_window;
143	aper->count = 1;
144
145	remove_conflicting_framebuffers(aper, "mgafb", true);
146
147	if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window,
148	"mgadrmfb_vram")) {
149	DRM_ERROR("can't reserve VRAM\n");
150	return -ENXIO;
151	}
152
153	mem = pci_iomap(mdev->dev->pdev, 0, 0);
154
155	mdev->mc.vram_size = mga_probe_vram(mdev, mem);
156
157	pci_iounmap(mdev->dev->pdev, mem);
158
159	return 0;
160	}
161
162	static int mgag200_device_init(struct drm_device *dev,
163	uint32_t flags)
164	{
165	struct mga_device *mdev = dev->dev_private;
166	int ret, option;
167
168	mdev->type = flags;
169
170	/* Hardcode the number of CRTCs to 1 */
171	mdev->num_crtc = 1;
172
173	pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
174	mdev->has_sdram = !(option & (1 << 14));
175
176	/* BAR 0 is the framebuffer, BAR 1 contains registers */
177	mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
178	mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
179
180	if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size,
181	"mgadrmfb_mmio")) {
182	DRM_ERROR("can't reserve mmio registers\n");
183	return -ENOMEM;
184	}
185
186	mdev->rmmio = pci_iomap(dev->pdev, 1, 0);
187	if (mdev->rmmio == NULL)
188	return -ENOMEM;
189
190	/* stash G200 SE model number for later use */
191	if (IS_G200_SE(mdev))
192	mdev->reg_1e24 = RREG32(0x1e24);
193
194	ret = mga_vram_init(mdev);
195	if (ret) {
196	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
197	return ret;
198	}
199
200	mdev->bpp_shifts[0] = 0;
201	mdev->bpp_shifts[1] = 1;
202	mdev->bpp_shifts[2] = 0;
203	mdev->bpp_shifts[3] = 2;
204	return 0;
205	}
206
207	void mgag200_device_fini(struct mga_device *mdev)
208	{
209	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
210	mga_vram_fini(mdev);
211	}
212
213	/*
214	* Functions here will be called by the core once it's bound the driver to
215	* a PCI device
216	*/
217
218
219	int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
220	{
221	struct mga_device *mdev;
222	int r;
223
224	mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL);
225	if (mdev == NULL)
226	return -ENOMEM;
227	dev->dev_private = (void *)mdev;
228	mdev->dev = dev;
229
230	r = mgag200_device_init(dev, flags);
231	if (r) {
232	dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
233	goto out;
234	}
235	r = mgag200_mm_init(mdev);
236	if (r)
237	goto out;
238
239	drm_mode_config_init(dev);
240	dev->mode_config.funcs = (void *)&mga_mode_funcs;
241	dev->mode_config.min_width = 0;
242	dev->mode_config.min_height = 0;
243	dev->mode_config.preferred_depth = 24;
244	dev->mode_config.prefer_shadow = 1;
245
246	r = mgag200_modeset_init(mdev);
247	if (r)
248	dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
249	out:
250	if (r)
251	mgag200_driver_unload(dev);
252	return r;
253	}
254
255	int mgag200_driver_unload(struct drm_device *dev)
256	{
257	struct mga_device *mdev = dev->dev_private;
258
259	if (mdev == NULL)
260	return 0;
261	mgag200_modeset_fini(mdev);
262	mgag200_fbdev_fini(mdev);
263	drm_mode_config_cleanup(dev);
264	mgag200_mm_fini(mdev);
265	mgag200_device_fini(mdev);
266	kfree(mdev);
267	dev->dev_private = NULL;
268	return 0;
269	}
270
271	int mgag200_gem_create(struct drm_device *dev,
272	u32 size, bool iskernel,
273	struct drm_gem_object **obj)
274	{
275	struct mgag200_bo *astbo;
276	int ret;
277
278	*obj = NULL;
279
280	size = roundup(size, PAGE_SIZE);
281	if (size == 0)
282	return -EINVAL;
283
284	ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
285	if (ret) {
286	if (ret != -ERESTARTSYS)
287	DRM_ERROR("failed to allocate GEM object\n");
288	return ret;
289	}
290	*obj = &astbo->gem;
291	return 0;
292	}
293
294	int mgag200_dumb_create(struct drm_file *file,
295	struct drm_device *dev,
296	struct drm_mode_create_dumb *args)
297	{
298	int ret;
299	struct drm_gem_object *gobj;
300	u32 handle;
301
302	args->pitch = args->width * ((args->bpp + 7) / 8);
303	args->size = args->pitch * args->height;
304
305	ret = mgag200_gem_create(dev, args->size, false,
306	&gobj);
307	if (ret)
308	return ret;
309
310	ret = drm_gem_handle_create(file, gobj, &handle);
311	drm_gem_object_unreference_unlocked(gobj);
312	if (ret)
313	return ret;
314
315	args->handle = handle;
316	return 0;
317	}
318
319	int mgag200_dumb_destroy(struct drm_file *file,
320	struct drm_device *dev,
321	uint32_t handle)
322	{
323	return drm_gem_handle_delete(file, handle);
324	}
325
326	int mgag200_gem_init_object(struct drm_gem_object *obj)
327	{
328	BUG();
329	return 0;
330	}
331
332	void mgag200_bo_unref(struct mgag200_bo **bo)
333	{
334	struct ttm_buffer_object *tbo;
335
336	if ((*bo) == NULL)
337	return;
338
339	tbo = &((*bo)->bo);
340	ttm_bo_unref(&tbo);
341	if (tbo == NULL)
342	*bo = NULL;
343
344	}
345
346	void mgag200_gem_free_object(struct drm_gem_object *obj)
347	{
348	struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
349
350	if (!mgag200_bo)
351	return;
352	mgag200_bo_unref(&mgag200_bo);
353	}
354
355
356	static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
357	{
358	return bo->bo.addr_space_offset;
359	}
360
361	int
362	mgag200_dumb_mmap_offset(struct drm_file *file,
363	struct drm_device *dev,
364	uint32_t handle,
365	uint64_t *offset)
366	{
367	struct drm_gem_object *obj;
368	int ret;
369	struct mgag200_bo *bo;
370
371	mutex_lock(&dev->struct_mutex);
372	obj = drm_gem_object_lookup(dev, file, handle);
373	if (obj == NULL) {
374	ret = -ENOENT;
375	goto out_unlock;
376	}
377
378	bo = gem_to_mga_bo(obj);
379	*offset = mgag200_bo_mmap_offset(bo);
380
381	drm_gem_object_unreference(obj);
382	ret = 0;
383	out_unlock:
384	mutex_unlock(&dev->struct_mutex);
385	return ret;
386
387	}